From nobody Sat Apr 18 07:34:41 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DF529CCA480 for ; Fri, 15 Jul 2022 19:30:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231244AbiGOTaL (ORCPT ); Fri, 15 Jul 2022 15:30:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60494 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231243AbiGOTaI (ORCPT ); Fri, 15 Jul 2022 15:30:08 -0400 Received: from mail-pj1-x104a.google.com (mail-pj1-x104a.google.com [IPv6:2607:f8b0:4864:20::104a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3FB2A14D36 for ; Fri, 15 Jul 2022 12:30:07 -0700 (PDT) Received: by mail-pj1-x104a.google.com with SMTP id x16-20020a17090ab01000b001f06332d7cfso5688838pjq.3 for ; Fri, 15 Jul 2022 12:30:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=i/SNdAfUk64D/RxNbdNG84VHTcos/SfQ4XEjfo9d3YU=; b=GIO9BhruH3LIpY/Zea8l81ccU4IDmV9rzZnA7dvgO7W6nafy51RiZxJo7KhYDyOUEv +YXqh0O9wFFwqFGLGKN+QFxsJH7LxZ0FpeocjWu+sGFjFAkNkX3vovDXYenLLG/ZCeKU YV4zhHYXWM2+gtuv5qVe7OlWqXMqyJj9OafRJjCKvARTSOtdbqZ5LWrkDxsA3yRtZ2ut uGVa23PFSvVaziCq11ZRnF0R4TvzMEx9PMys5F9YJo0N4ZRlF+3h918hXbScxGNEOAbS hcmUYpXecl1NgBkwty2vcjAxsvVfyQJFNy9iBv79uYCNS0/vNSVjQvsOB92wVM2yLD8l Mceg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=i/SNdAfUk64D/RxNbdNG84VHTcos/SfQ4XEjfo9d3YU=; b=oyFwFP/rua8c2jv2GbVobGzPXxHJzb4Q1hHOwNNPbva0svGo1VF4yClMlHDagSNZds yXxlFq8p5Njn7ENWjDEramlL2toJO5rTMEHxKohbgC509CRCfGhi1Brb4hZ08ZZg0VJp Kw8l903dp92CSZ2ADsokRdGuo2TI7w/hRYtnxD7DxaW7lj4C+5c01to0bm/MwUaHVxDq 5d8Z+YSGCiUvsZyzDRF28cI5o8wXySTE89XK7FjLI+Vd7bGdKoWJlrybIl/iA6Nar4Ms ABSglak/TMiIAhoTYeX0rqyxtpAfUPR65v7vGbjEg808qlwrNmrcHNun+xA9PePkT0W9 KT4w== X-Gm-Message-State: AJIora/ONh36Zgu70GsMX21iVFiCBPC3mxj6I33VVRvJ0H1uVwTFLa5b BDOpWI4/Q4n3crkQlWLlZA3Hd3HhszA= X-Google-Smtp-Source: AGRyM1ucQOxDPQQqnhPTOZKAyy7maDKwTgvQAXn9qfcGo6mrLBrJing2NLMwfJYvq8fiEQWs7K9Rd+4kHE4= X-Received: from pgonda1.kir.corp.google.com ([2620:15c:29:203:bd4e:b81d:4780:497d]) (user=pgonda job=sendgmr) by 2002:a63:455a:0:b0:412:9855:64eb with SMTP id u26-20020a63455a000000b00412985564ebmr13789376pgk.131.1657913406759; Fri, 15 Jul 2022 12:30:06 -0700 (PDT) Date: Fri, 15 Jul 2022 12:29:46 -0700 In-Reply-To: <20220715192956.1873315-1-pgonda@google.com> Message-Id: <20220715192956.1873315-2-pgonda@google.com> Mime-Version: 1.0 References: <20220715192956.1873315-1-pgonda@google.com> X-Mailer: git-send-email 2.37.0.170.g444d1eabd0-goog Subject: [PATCH V2] KVM: selftests: Add simple sev vm testing From: Peter Gonda To: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, marcorr@google.com, seanjc@google.com, michael.roth@amd.com, thomas.lendacky@amd.com, joro@8bytes.org, mizhang@google.com, pbonzini@redhat.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Michael Roth A very simple of booting SEV guests that checks related CPUID bits. This is a stripped down version of "[PATCH v2 08/13] KVM: selftests: add SEV boot tests" from Michael but much simpler. Signed-off-by: Michael Roth --- tools/testing/selftests/kvm/.gitignore | 1 + tools/testing/selftests/kvm/Makefile | 1 + .../selftests/kvm/x86_64/sev_all_boot_test.c | 134 ++++++++++++++++++ 3 files changed, 136 insertions(+) create mode 100644 tools/testing/selftests/kvm/x86_64/sev_all_boot_test.c diff --git a/tools/testing/selftests/kvm/.gitignore b/tools/testing/selftes= ts/kvm/.gitignore index f44ebf401310..ec084a61a819 100644 --- a/tools/testing/selftests/kvm/.gitignore +++ b/tools/testing/selftests/kvm/.gitignore @@ -34,6 +34,7 @@ /x86_64/pmu_event_filter_test /x86_64/set_boot_cpu_id /x86_64/set_sregs_test +/x86_64/sev_all_boot_test /x86_64/sev_migrate_tests /x86_64/smm_test /x86_64/state_test diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests= /kvm/Makefile index f3f29a64e4b2..2b89e6bcb5b0 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -123,6 +123,7 @@ TEST_GEN_PROGS_x86_64 +=3D x86_64/tsc_msrs_test TEST_GEN_PROGS_x86_64 +=3D x86_64/vmx_pmu_caps_test TEST_GEN_PROGS_x86_64 +=3D x86_64/xen_shinfo_test TEST_GEN_PROGS_x86_64 +=3D x86_64/xen_vmcall_test +TEST_GEN_PROGS_x86_64 +=3D x86_64/sev_all_boot_test TEST_GEN_PROGS_x86_64 +=3D x86_64/sev_migrate_tests TEST_GEN_PROGS_x86_64 +=3D x86_64/amx_test TEST_GEN_PROGS_x86_64 +=3D x86_64/max_vcpuid_cap_test diff --git a/tools/testing/selftests/kvm/x86_64/sev_all_boot_test.c b/tools= /testing/selftests/kvm/x86_64/sev_all_boot_test.c new file mode 100644 index 000000000000..222ce41d6f68 --- /dev/null +++ b/tools/testing/selftests/kvm/x86_64/sev_all_boot_test.c @@ -0,0 +1,134 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Basic SEV boot tests. + * + * Copyright (C) 2021 Advanced Micro Devices + */ +#define _GNU_SOURCE /* for program_invocation_short_name */ +#include +#include +#include +#include +#include + +#include "test_util.h" + +#include "kvm_util.h" +#include "processor.h" +#include "svm_util.h" +#include "linux/psp-sev.h" +#include "sev.h" + +#define VCPU_ID 2 +#define PAGE_STRIDE 32 + +#define SHARED_PAGES 8192 +#define SHARED_VADDR_MIN 0x1000000 + +#define PRIVATE_PAGES 2048 +#define PRIVATE_VADDR_MIN (SHARED_VADDR_MIN + SHARED_PAGES * PAGE_SIZE) + +#define TOTAL_PAGES (512 + SHARED_PAGES + PRIVATE_PAGES) + +#define NR_SYNCS 1 + +static void guest_run_loop(struct kvm_vcpu *vcpu) +{ + struct ucall uc; + int i; + + for (i =3D 0; i <=3D NR_SYNCS; ++i) { + vcpu_run(vcpu); + switch (get_ucall(vcpu, &uc)) { + case UCALL_SYNC: + continue; + case UCALL_DONE: + return; + case UCALL_ABORT: + TEST_ASSERT(false, "%s at %s:%ld\n\tvalues: %#lx, %#lx", + (const char *)uc.args[0], __FILE__, + uc.args[1], uc.args[2], uc.args[3]); + default: + TEST_ASSERT( + false, "Unexpected exit: %s", + exit_reason_str(vcpu->run->exit_reason)); + } + } +} + +static void __attribute__((__flatten__)) +guest_sev_code(void) +{ + uint32_t eax, ebx, ecx, edx; + uint64_t sev_status; + + GUEST_SYNC(1); + + eax =3D 0x8000001f; + ecx =3D 0; + cpuid(&eax, &ebx, &ecx, &edx); + GUEST_ASSERT(eax & (1 << 1)); + + sev_status =3D rdmsr(MSR_AMD64_SEV); + GUEST_ASSERT((sev_status & 0x1) =3D=3D 1); + + GUEST_DONE(); +} + +static struct sev_vm * +setup_test_common(void *guest_code, uint64_t policy, struct kvm_vcpu **vcp= u) +{ + uint8_t measurement[512]; + struct sev_vm *sev; + struct kvm_vm *vm; + int i; + + sev =3D sev_vm_create(policy, TOTAL_PAGES); + if (!sev) + return NULL; + vm =3D sev_get_vm(sev); + + /* Set up VCPU and initial guest kernel. */ + *vcpu =3D vm_vcpu_add(vm, VCPU_ID, guest_code); + kvm_vm_elf_load(vm, program_invocation_name); + + /* Allocations/setup done. Encrypt initial guest payload. */ + sev_vm_launch(sev); + + /* Dump the initial measurement. A test to actually verify it would be ni= ce. */ + sev_vm_launch_measure(sev, measurement); + pr_info("guest measurement: "); + for (i =3D 0; i < 32; ++i) + pr_info("%02x", measurement[i]); + pr_info("\n"); + + sev_vm_launch_finish(sev); + + return sev; +} + +static void test_sev(void *guest_code, uint64_t policy) +{ + struct sev_vm *sev; + struct kvm_vcpu *vcpu; + + sev =3D setup_test_common(guest_code, policy, &vcpu); + if (!sev) + return; + + /* Guest is ready to run. Do the tests. */ + guest_run_loop(vcpu); + + pr_info("guest ran successfully\n"); + + sev_vm_free(sev); +} + +int main(int argc, char *argv[]) +{ + /* SEV tests */ + test_sev(guest_sev_code, SEV_POLICY_NO_DBG); + test_sev(guest_sev_code, 0); + + return 0; +} --=20 2.37.0.170.g444d1eabd0-goog